diff options
| author | Johannes Weiner <hannes@cmpxchg.org> | 2009-03-04 21:39:12 +0100 |
|---|---|---|
| committer | Chris Zankel <chris@zankel.net> | 2009-04-03 08:45:07 +0200 |
| commit | 4476c96769ec083c53fbdbd37b538105deb65aa2 (patch) | |
| tree | ae29b4d46fb63aab25a22da8eb6d4ab992f5b1e6 /arch/xtensa/kernel/time.c | |
| parent | xtensa: use generic sched_clock() (diff) | |
| download | linux-4476c96769ec083c53fbdbd37b538105deb65aa2.tar.xz linux-4476c96769ec083c53fbdbd37b538105deb65aa2.zip | |
xtensa: remove platform rtc hooks
platform_get/set_rtc_time() is not implemented by any of the supported
xtensa platforms. Remove the facility completely.
The initial seconds for xtime come from read_persistent_clock() which
returns just 0 in the generic implementation. Platforms that sport a
persistent clock can implement this function.
This is needed to implement the ccount as a clock source.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/kernel/time.c')
| -rw-r--r-- | arch/xtensa/kernel/time.c | 29 |
1 files changed, 1 insertions, 28 deletions
diff --git a/arch/xtensa/kernel/time.c b/arch/xtensa/kernel/time.c index 86bfe83718e9..db14a3d88db7 100644 --- a/arch/xtensa/kernel/time.c +++ b/arch/xtensa/kernel/time.c @@ -14,7 +14,6 @@ #include <linux/errno.h> #include <linux/time.h> -#include <linux/timex.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/init.h> @@ -25,18 +24,11 @@ #include <asm/timex.h> #include <asm/platform.h> - -DEFINE_SPINLOCK(rtc_lock); -EXPORT_SYMBOL(rtc_lock); - - #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT unsigned long ccount_per_jiffy; /* per 1/HZ */ unsigned long nsec_per_ccount; /* nsec per ccount increment */ #endif -static long last_rtc_update = 0; - static irqreturn_t timer_interrupt(int irq, void *dev_id); static struct irqaction timer_irqaction = { .handler = timer_interrupt, @@ -46,8 +38,6 @@ static struct irqaction timer_irqaction = { void __init time_init(void) { - time_t sec_o, sec_n = 0; - /* The platform must provide a function to calibrate the processor * speed for the CALIBRATE. */ @@ -59,15 +49,8 @@ void __init time_init(void) (int)(ccount_per_jiffy/(10000/HZ))%100); #endif - /* Set time from RTC (if provided) */ - - if (platform_get_rtc_time(&sec_o) == 0) - while (platform_get_rtc_time(&sec_n)) - if (sec_o != sec_n) - break; - xtime.tv_nsec = 0; - last_rtc_update = xtime.tv_sec = sec_n; + xtime.tv_sec = read_persistent_clock(); set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec, -xtime.tv_nsec); @@ -169,16 +152,6 @@ again: next += CCOUNT_PER_JIFFY; set_linux_timer(next); - if (ntp_synced() && - xtime.tv_sec - last_rtc_update >= 659 && - abs((xtime.tv_nsec/1000)-(1000000-1000000/HZ))<5000000/HZ) { - - if (platform_set_rtc_time(xtime.tv_sec+1) == 0) - last_rtc_update = xtime.tv_sec+1; - else - /* Do it again in 60 s */ - last_rtc_update += 60; - } write_sequnlock(&xtime_lock); } |